Year	% of cohort
1976	93.1320190429688
1977	90.7144622802734
1978	88.8588104248047
1982	90.2902374267578
2000	96.8517379760742
2005	97.4472122192383
2006	97.1933975219727
2007	94.813850402832
2012	95.3401489257812
2013	92.8734893798828
2016	96.4956436157227
2020	96.13330078125